/// <summary>
/// Registers a Frame object as a NavigationService and returns the instance of the new service.
/// </summary>
/// <param name="frame">The frame to be used to create the service.</param>
/// <param name="frameLevel">The frame level of the new service.</param>
/// <returns></returns>
public FrameNavigationService RegisterFrameAsNavigationService(Frame frame, FrameLevel frameLevel = FrameLevel.Two)
{
//Check if the user is trying to register a top-level Navigation Service.
if (RootNavigationService != null && frameLevel == FrameLevel.One)
{
throw new Exception("There can only be one level-one navigation service.");
}
//If it isn't already in the list, add it.
if (navigationServices.Any(x => x.NavigationLevel == frameLevel))
{
throw new Exception();
}
//Creates the new service.
var service = new FrameNavigationService(frame, this, frameLevel);
//navigationServices.Add(service);
//Returns the new service for the user to use.
return(service);
}
public void RegisterCustomNavigationService(NavigationServiceBase service, FrameLevel frameLevel = FrameLevel.Two)
{
//Check if the user is trying to register a top-level Navigation Service.
if (RootNavigationService != null && frameLevel == FrameLevel.One)
{
throw new Exception("There can only be one level-one navigation service.");
}
//If it isn't already in the list, add it.
if (navigationServices.Any(x => x.NavigationLevel == frameLevel))
{
throw new Exception();
}
if (service == null)
{
throw new ArgumentNullException(nameof(service));
}
service.NavigationLevel = frameLevel;
service.NavigationManager = this;
navigationServices.Add(service);
}
/// <summary>
/// Returns the corresponding NavigationService based on the FrameLevel provided.
/// </summary>
/// <param name="level">The FrameLevel of the service to return.</param>
/// <returns></returns>
public NavigationServiceBase GetNavigationServiceFromFrameLevel(FrameLevel level = FrameLevel.One)
{
var service = navigationServices.FirstOrDefault <NavigationServiceBase>(x => x.NavigationLevel == level);
return(service);
}
/// <summary>
/// Removes all NavigationServices with the specified FrameLevel.
/// </summary>
/// <param name="frameLevel">The FrameLevel used to remove the services.</param>
public void UnregisterNavigationServiceByFrameLevel(FrameLevel frameLevel)
{
navigationServices.RemoveAll(x => x.NavigationLevel == frameLevel);
}
internal FrameNavigationService(Frame navFrame, NavigationManager manager, FrameLevel navigationLevel) : this(navFrame, manager)
{
NavigationLevel = navigationLevel;
}
